On the stand last September, Valladares testified he gave the murder weapon, a TEC-9 semiautomatic, to Gatica who opened fire.

At Valladares' trial, prosecutors said a group of Maniac Latin Disciples descended on the party, angry because they'd been forced to leave the premises earlier in the night.

When Gatica was arrested, detectives said he had showed up to the party uninvited and became upset by the "perceived slight" of being asked to leave. Gatica went to Valladares' residence to get a gun telling him that he needed it to shoot someone.

Shortly after getting the TEC-9, Gatica returned to the party and began shooting erratically, letting four to six bullets fly through the air. The attack was captured by surveillance video.